A(ml) B(mL) R2 For true volume TrueX 30.52 9.8 0.925 For true volume OSEM 27 10.9 0.894 For measured volume TrueX 24 11 0. 901 For measured volume OSEM 27.5 10.2 0.889

Table 1: The values of A and B (mL) that verify the relation between percent threshold and inverse of the true and measured volume for both algorithms. The data have been fitted through a linear regression.